Enable thread-safe locales on some freebsd versions

This had been disabled in the hints file due to bugs, which perl now
works around, so reenable (and reformat some lines for clarity)

hints/freebsd.sh

@@ -327,9 +327,11 @@ d_printf_format_null='undef'
 # Experiments have shown that this doesn't fully work.  The first kernel we know it works is 1200056
 
 FREEBSD_KERNEL_VERSION=`uname -U`
-#if  [ $FREEBSD_KERNEL_VERSION -lt 1003507 ] || \
-#    [ $FREEBSD_KERNEL_VERSION -ge 1100000 ] && [ $FREEBSD_KERNEL_VERSION -lt 1100502 ] || \
-#    [ $FREEBSD_KERNEL_VERSION -ge 1200000 ] && [ $FREEBSD_KERNEL_VERSION -lt 1200004 ]
+if  [     $FREEBSD_KERNEL_VERSION -lt 1003507           \
+   -o \(  $FREEBSD_KERNEL_VERSION -ge 1100000           \
+       -a $FREEBSD_KERNEL_VERSION -lt 1100502 \)        \
+   -o \(  $FREEBSD_KERNEL_VERSION -ge 1200000           \
+       -a $FREEBSD_KERNEL_VERSION -lt 1200004 \) ]
 if  [ $FREEBSD_KERNEL_VERSION -lt 1200056 ]     # But other bugs remain; see below
 then
     d_uselocale='undef'